Well, pardon me for actually defending something that I wish wasn't political.
It is an extremely complicated issue.
The way I understand it from the short little bit I have read today on this there are two ways of doing it:
A) The current way - which takes proposed legislation and projects what will happen going forward basically in a vacuum. This doesn't take into account affects the legislation has on the greater economy and how that affects tax income...etc.
B) Dynamic Scoring - This tries to take into account how legislation affects the bigger picture and in turn, how it affects the budget and tax income.
Well.....to me, (A) is much more clean cut and relatively easier to do. There are fewer variables. But, as we all know, legislation DOES affect the greater economy, tax revenue and the budget. So, in essence, what the CBO is putting out now, we all know is technically not what is going to happen.
(B) on the other hand, is very difficult to do and certain legislation done at one point in time may have a different reaction in the economy than it would at a different time. It is much more (as the name implies) dynamic.
So, to me, neither is perfect and if I were a manager trying to make a decision, I would want to see both projections.
I'll agree that both are flawed but option B seems to be a lot more susceptible to juking the stats.
I'll put a marker out there: if our CBO scorekeeper is forced to adopt partisan voodoo economics the Republican congress is going to focus primarily on fiscal policy that primarily benefits the wealthiest Americans. (Just kidding. That's what they're going to do regardless . . . but I suspect that they'll try to cloak it in their feigned interest in fiscal responsibility.)